I used to work at a gas station. They are not more reliable, not even close. The difference is that a gas pump is never unattended and the attendants can quickly do the easy fixes, like a reboot.

Pay attention to how often a single pump is out of service at a gas station. It's quite frequent. You just don't care because there are other pumps you can use.

OTOH, most non Tesla charging stations are a single charger with multiple heads. Redundancy is a big reason for the perceived reliability of gas stations and Tesla superchargers.

Gas pumps are operated by customers in many parts of the world

But there's always a human around somewhere.

There are quite a few unattended stations in NZ

The Tesla superchargers have had perfect reliability in my experience, and it seems others agree that they are highly reliable.

Right, so reliability is mostly unrelated to the percieved mechanical or physical complexity.

The problem isn't just the number of moving parts; it's far simpler to design a common gas pump than it is to design a DC fast charger, the electronics inside, the software, the network connectivity, app development, and, most importantly, the ability to successfully handshake with every single EV out there (easier said than done).

Exactly. It's possible to build an incredibly reliable mechanical system, and all-too-possible to build a very unreliable system with no moving parts and lots of software (and network connectivity).